<template>
  <div>
     <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/Home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
        <!-- 添加角色按钮区域 -->
        <el-row>
          <el-col>
           <el-button type="primary">添加角色</el-button>
          </el-col>
        </el-row>

        <!-- 角色列表区域 -->
        <el-table :data="rolelist" border stripe>
            <!-- 展开列 -->
            <el-table-column type="expand">
              <template slot-scope="scope">
                <el-row :class="['bdbottom', i1 === 0 ? 'bdtop' :'', 'vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
                    <!-- 渲染一级权限 -->
                    <el-col :span="5">
                      <el-tag closable @close="removeRightById(scope.row, item1.id)">{{item1.authName}}</el-tag>
                      <i class="el-icon-caret-right"></i>
                    </el-col>
                    <!-- 渲染二级和三级权限 -->
                    <el-col :span="19">
                        <!-- 通过 for 循环 嵌套渲染二级权限 -->
                        <el-row :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']" v-for="(item2, i2) in item1.children" :key="item2.id">
                          <el-col :span="6">
                            <el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">{{item2.authName}}</el-tag>
                            <i class="el-icon-caret-right"></i>
                          </el-col>
                          <el-col :span="18">
                            <el-tag type="warning" v-for="(item3, index) in item2.children" :key="item3.id + index" closable @close="removeRightById(scope.row, item3.id)">{{item3.authName}}</el-tag>
                          </el-col>
                        </el-row>
                    </el-col>
                </el-row>
              </template>
            </el-table-column>
            <!-- 索引列 -->
          <el-table-column type="index" >
            <template slot="header">
                <div class="index-header">
                    #
                </div>
            </template>
          </el-table-column>
          <el-table-column label="角色名称" prop="roleName"></el-table-column>
          <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
          <el-table-column label="操作" width="300px">
            <template slot-scope="scope">
              <el-button size="mini" type="primary" icon="el-icon-edit" @click="handleEdit(scope.row.id)">编辑</el-button>
              <el-button size="mini" type="danger" icon="el-icon-delete" @click="handleDelete(scope.row.id)">删除</el-button>
              <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
            </template>
          </el-table-column>
        </el-table>
    </el-card>

    <!-- 分配权限的对话框 -->
    <el-dialog title="分配权限" :visible.sync="setRightDialogVisiable" width="30%" @close="setRightDialogClosed">
      <!-- 树形控件（添加ref） -->
      <el-tree
        :data="rightsList"
        :props="treeProps"
        show-checkbox
        node-key="id"
        default-expand-all
        :default-checked-keys="defKeys"
        ref="treeRef"
      ></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisiable = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
  </span>
</el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      rolelist: [],
      setRightDialogVisiable: false,
      rightsList: [],
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      defKeys: [],
      roleId: ''
    }
  },
  created() {
    this.getRolesList()
  },
  methods: {
    // 获取所有角色的列表（移除多余参数）
    async getRolesList() {
      const { data: res } = await this.$http.get('roles')

      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败！')
      }

      this.rolelist = res.data

      console.log(this.rolelist)
    },
    // 根据Id删除对应的权限
    async removeRightById(role, rightId) {
      // 弹框提示用户是否要删除
      const confirmResult = await this.$confirm('此操作将永久删除该权限, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)

      if (confirmResult !== 'confirm') {
        return this.$message.info('取消了删除！')
      }

      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)

      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败！')
      }

      //   this.getRolesList()
      role.children = res.data
    },
    // 展示分配权限的对话框
    async showSetRightDialog(role) {
      this.roleId = role.id
      // 获取所有权限数据（添加await关键字）
      const { data: res } = await this.$http.get('rights/tree')

      if (res.meta.status !== 200) {
        return this.$message.error('获取权限数据失败！')
      }

      // 把获取到的权限数据保存到 data 中
      this.rightsList = res.data
      console.log(this.rightsList)

      // 递归获取三级节点的id
      this.getLeafKeys(role, this.defKeys)
      this.setRightDialogVisiable = true
    },
    // 通过递归的形式，获取角色下所有三级权限的id,并保存到defKeys数组中
    getLeafKeys(node, arr) {
      // 如果当前node节点不包含children属性，则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }

      node.children.forEach(item => this.getLeafKeys(item, arr))
    },
    // 监听分配权限对话框的关闭事件
    setRightDialogClosed() {
      this.defKeys = []
    },
    // 点击为角色分配权限
    async allotRights() {
      // 确保treeRef存在
      if (!this.$refs.treeRef) {
        return this.$message.error('权限树组件未加载完成')
      }

      // 获取选中的权限ID（修正方法名）
      const checkedKeys = this.$refs.treeRef.getCheckedKeys()
      const halfCheckedKeys = this.$refs.treeRef.getHalfCheckedKeys()
      const allKeys = [...checkedKeys, ...halfCheckedKeys]

      const idStr = allKeys.join(',')

      try {
        const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })

        if (res.meta.status !== 200) {
          return this.$message.error('分配权限失败！')
        }

        this.$message.success('分配权限成功！') // 修正消息提示
        this.getRolesList()
        this.setRightDialogVisiable = false
      } catch (error) {
        this.$message.error('分配权限失败：' + error.message)
        console.error(error)
      }
    }
  }
}
</script>

<style lang="less" scoped>
.el-tag {
    margin: 7px;
}

.bdtop {
    border-top: 1px solid #eee
}

.bdbottom {
    border-top: 1px solid #eee
}

.vcenter {
    display: flex;
    align-items: center;
}
</style>
